Improvement in sash-balances



UNITED STATES PATENT OFFICEo DAVID F. STAMBAUGH AND WILLIAM A. SMITH, OF CASEY, ILLINOIS.

IMPROVEMENT IN SASH-BALANCES.

Specication forming part of Letters Patent No. l 88,432, dated March 13, 1877; application tiled February 8, 1877.

employment, with a window-frame and sash, of`

a shaftvprovided with a collar, a gear-Wheel` a nut, and a knob, together with a rack-bar,

by meansof which combined devices the sash can be held at any desired point and securely locked by'turning the knob, as will be hereinafter more fully set forth and deinitely claimed. I

y In order to enable others skilled in the art to make and useour invention, we will now proceed to describe its construction and operation.

In the annexed drawings, making part of this specification, Figure l represents a side -elevation, with a portion ofl one -side of the frame cut away, and Fig. 2 a section of the .Working parts. y A

ln the gures,-A represents an ordinary vwe have hereunto set our hands this 12th day v Window-frame, in one portion of`wl1ich, A', are

' placed the working devices for raising and loweringl thevsash. n 'Y y B represents the sash, which is uprovided upon one edge with a rack-bar, a, which is embedded within the edge 'until ush with it.

D represents a shaft, which passes into the frame from its front, and which has a bearing for its inner end, as seen at fr. Upon this shaft is a gear-wheel, C, having a collar, e,

which is provided with a set-screw for holding the wheel at any desired point upon'the shaft. The outer end of the shaft D passes` through1 a nut, d, a metallic plate, G', on the outside of the frame, and then into a nutin the knob F, said shaft being provided upon a portion ot' its outer end with a suitable screw-thread to tit the thread of' the nuts. The gear-wheel C meshes into the teeth of the rack-bar a, and when the sash is raised as high as is desirable the knob F is turned to the right until the plate G is tightly clamped between its inner end and the nut d. This holds the shaft D and prevents the wheel C fromturning, and of course holds the window/sash in desired position. This device acts as a lock to the sash when itis down, and prevents itfrombeing raised from the outside.

.Having thus fully described our invention, what we claim 'as new, and desire'to secure by Letters Patent, isy The shaft, D, provided with a gear-wheel,

'0, and collar c, in combination withthe nut d,

the knob F, and the rackLbar a, theknob serving to make the parts rigid, for holding the sash at any desired point, substantially as set forth. Y

In testimony that we'claim the foregoing,

Witnesses:

FRANK GALT, M. E. ADAMS. 

